The basic building block is a 20 kVA/kW module. Its connection clamps are laid out so that the communication signal connections are segregated and separated from the power connections (inputs, output, battery), thus ensuring complete immunity from interference generated by the power supply grid, which is typically disturbed in industrial environments. The module has a front to back air flow realised by a smart ventilation principle, which manages the fan speed and airflow in accordance with the current room temperature and load level. The Sentryum Rack cabinet is available in 2 versions, single-phase and three-phase output; it is designed to house up to 3 modules (60 kVA/kW) and it can be connected in parallel for a total of 8 modules and 160 kVA/kW of power. The Sentryum Rack cabinet has a distribution panel that contains all the devices to disconnect each module (3 input rectifier disconnectors, 3 input bypass disconnectors, 3 output disconnectors, 3 battery fuse holders), as well as a manual maintenance bypass that isolates the 3 modules and guarantees power continuity to the load. Both modules and cabinets are provided with the bypass line separated from the rectifier line, ensuring greater availability of the power supply to the UPS system and consequently extending this benefit to the load.

Sentryum Rack can be purchased as a single 20 kVA/kW module and installed in a 19-inch rack cabinet or mechanical support provided by the user. Another way is to lean the module on the right side; the display can be rotated 90° counter clockwise. It is also possible to remote the display (maximum 2 meters) in case the module is fitted inside a cabinet. The power terminals (inputs, output, battery) are connected by front harting connectors, ensuring simplicity and operating safety during insertion/removal, protection against electrical contacts and immunity from environmental conditions typical of industrial settings (dust, humidity, suspended chemical particles). The removal and replacement of a faulty module or the addition into the system of a new one can be carried out easily by the user from the front panel.

The Sentryum Rack module can be used as a standalone unit or in a parallel configuration; by simply adding the parallel kit for each module, the UPS system can grow as requirements demand (from 20 to 160 kVA/kW). Every module is completely independent with regards to the control and management of the operator interfaces; this facilitates all monitoring, control and fault detection operations, ensuring increased reliability in that any malfunctions in parts or accessories will not propagate through the entire system. Sentryum Rack ensures vertical scalability that minimises the system footprint, the user can thus have power capabilities from 20 to 60 kVA/kW for a single Sentryum Rack cabinet without increasing the footprint.

The 20 kVA/kW module in the standalone version is provided with input/output plug-in harting power connectors (inputs, output, battery) with three meter length loose electrical cable to arrange the cabling according with the installation enclosure. These cables are not provided when the module is ordered to be fitted inside the Sentryum Rack cabinet, because they are already installed inside as standard. Standalone module versions can be housed in any suitable cabinet or enclosure as it is compatible with standard 19” width.

This Series is derived from the Sentryum series and essentially inherits its main technologies and standalone module versions:

• Full power rating available up to 40 °C (kVA=kW unity pf) and up to 96.3% VFI efficiency;
• Zero impact source, thanks to a very low input THDi <3%, input pf 0.99, power walk-in function, power walk-in start delay function;
• Up to 20 Amps battery recharging current and wide battery block range (the standard 20+20 battery blocks @ 12V with Neutral central point can be adjusted from 15+15 to 22+22);
• Three-level IGBT inverter, extremely low output THDv;
• Up to 270% inverter current for 200 msec. and 150% for 300 msec., which enables the system to deal with sudden peak loads (without static bypass intervention) and provide the short circuit current if required during operation on battery;
• “Cold start” function for starting the UPS from the battery.

In addition, Sentryum Rack provides a filtering and power factor correction function within the power network upstream of the UPS, thus eliminating harmonic components and reactive power generated by the power utilities.

The Smart Battery Management system, which is also compatible with Li-Ion batteries and Supercapacitors, consists of a series of features and capabilities to optimise battery management and obtain the best possible performance and operating life:

• Battery recharging for use with VRLA, AGM, GEL, Open Vented and Nickel Cadmium batteries;
• Availability of different charging methods, like one-level voltage recharge (typically used for VRLA AGM batteries), two-level voltage recharge (according to IU specification) and cyclical recharge (to reduce electrolyte consumption and lengthen the life of VRLA batteries);
• Recharge voltage compensation based on ambient temperature;
• Battery tests to diagnose in advance any reduction in performance or problems with the batteries;
• Deep discharge protection, by increasing the end-of-discharge voltage during extended low-load discharges, as recommended by battery manufacturers;
• Negligible Ripple current (residual AC component at low frequency) by using a high frequency battery charger;
• Wide voltage range for the rectifier operating (up to -40% at half load).

Sentryum Rack module is equipped with a coloured graphic touch screen display providing UPS information, measurements, operating statuses and alarms in different languages. The default screen displays the UPS status, graphical indication of the energy path through the UPS and the operational condition of the various assemblies (rectifier, batteries, inverter, bypass) within the UPS. Furthermore, the user interface includes a UPS status led bar which delivers immediate and clear information regarding the overall status of the UPS by changing the colour (light blue, dark blue, orange and red) according with the operating mode and condition.

• Advanced multi-platform communications for all operating systems and network environments: PowerShield³ monitoring and shutdown software included for Windows operating systems 11, 10, 8, Hyper-V, Server 2022, 2019, 2016 and previous versions, Windows Server Virtualization Hyper-V, macOS, Linux, Citrix XenServer and other Unix operating systems;
• Compatible with VMware infrastructures to perform graceful shutdown of hosts and clusters; to perform Vmotion and prioritised shutdown of VM thanks to NetMan 208 Network card;
• Compatible with Nutanix and Syneto infrastructures to perform graceful shutdown of hosts; to perform prioritised shutdown of VM thanks to NetMan 208 Network card;
• RS232 port on RJ10 connector and USB ports;
• 2 slots for optional communications cards such as network adaptors and volt free contacts etc;
• Embedded contact interface which includes 5 programmable inputs and 4 programmable outputs;
• R.E.P.O. Remote Emergency Power Off for switching off the UPS via a remote emergency button;
• Graphic display panel for remote connection.